<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>登录</h1>
<form id="myForm">
    用户名:<input type="text" name="username" placeholder="用户名"><br>
    密码:<input type="password" name="password" placeholder="密码"><br>
  <input type="button" value="登录" @click="login()">
</form>
<!--引入axios和vue-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.14/vue.js"></script>
<script>
    let v = new Vue({
        el:"#myForm",
        data:{},
        methods:{
            login:function () {
                let data = new FormData(document.querySelector("form"));
                axios.post("/login",data).then(function (response) {
                    if(response.data==1){
                        alert("登录成功");
                        location.href="/";
                    }else if(response.data==2){
                        alert("用户名不存在")
                    }else{
                        alert("密码错误")
                    }
                })
            }
        }

    })


</script>

</body>
</html>